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NVD / CVE Program· CNA redhat

CVE-2026-15809: Github.com/cri-o/cri-o: fix bypass for cve-2022-4318 — /etc/passwd injection via home env

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: cri-o (Red Hat:openshift:4.12::el8) 0:1.25.5-36.rhaos4.12.git2e7f657.el8; cri-o-debuginfo (Red Hat:openshift:4.12::el8) 0:1.25.5-36.rhaos4.12.git2e7f657.el8; cri-o-debugsource (Red Hat:openshift:4.12::el8) 0:1.25.5-36.rhaos4.12.git2e7f657.el8.

Low priority for now. Upgrade to cri-o (Red Hat:openshift:4.12::el8) 0:1.25.5-36.rhaos4.12.git2e7f657.el8; cri-o-debuginfo (Red Hat:openshift:4.12::el8) 0:1.25.5-36.rhaos4.12.git2e7f657.el8; cri-o-debugsource (Red Hat:openshift:4.12::el8) 0:1.25.5-36.rhaos4.12.git2e7f657.el8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 15, 2026
Updated
Oct 1, 2026
EPSS
0.1% · 7th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-15809

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Confidential Compute Attestation

    • all versionsaffected

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat OpenShift Container Platform 4.12

    • 0:1.25.5-36.rhaos4.12.git2e7f657.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.13

    • 0:1.26.5-32.rhaos4.13.git1088e36.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.14

    • 0:1.27.8-22.rhaos4.14.git0633bf1.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.15

    • 0:1.28.11-17.rhaos4.15.git48e6ddb.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.16

    • 0:1.29.13-14.rhaos4.16.git84cfdc6.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.17

    • 0:1.30.14-13.rhaos4.17.git3a25d98.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.18

    • 0:1.31.13-14.rhaos4.18.gitf2de9ac.el8 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.19

    • 0:1.32.13-11.rhaos4.19.git089e95c.el9 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.20

    • 0:1.33.13-5.rhaos4.20.git7ebc848.el9 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4.21

    • 0:1.34.11-4.rhaos4.21.git358c4b4.el9 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Red Hat:openshift:4.12::el8cri-obefore 0:1.25.5-36.rhaos4.12.git2e7f657.el80:1.25.5-36.rhaos4.12.git2e7f657.el8
Red Hat:openshift:4.12::el8cri-o-debuginfobefore 0:1.25.5-36.rhaos4.12.git2e7f657.el80:1.25.5-36.rhaos4.12.git2e7f657.el8
Red Hat:openshift:4.12::el8cri-o-debugsourcebefore 0:1.25.5-36.rhaos4.12.git2e7f657.el80:1.25.5-36.rhaos4.12.git2e7f657.el8
Red Hat:openshift:4.13::el8containernetworking-pluginsbefore 1:1.4.0-8.rhaos4.13.el81:1.4.0-8.rhaos4.13.el8
Red Hat:openshift:4.13::el8containernetworking-plugins-debuginfobefore 1:1.4.0-8.rhaos4.13.el81:1.4.0-8.rhaos4.13.el8
Red Hat:openshift:4.13::el8containernetworking-plugins-debugsourcebefore 1:1.4.0-8.rhaos4.13.el81:1.4.0-8.rhaos4.13.el8
Red Hat:openshift:4.13::el8cri-obefore 0:1.26.5-32.rhaos4.13.git1088e36.el80:1.26.5-32.rhaos4.13.git1088e36.el8
Red Hat:openshift:4.13::el8cri-o-debuginfobefore 0:1.26.5-32.rhaos4.13.git1088e36.el80:1.26.5-32.rhaos4.13.git1088e36.el8
Red Hat:openshift:4.13::el8cri-o-debugsourcebefore 0:1.26.5-32.rhaos4.13.git1088e36.el80:1.26.5-32.rhaos4.13.git1088e36.el8
Red Hat:openshift:4.13::el8cri-toolsbefore 0:1.26.0-9.el80:1.26.0-9.el8
Red Hat:openshift:4.13::el8cri-tools-debuginfobefore 0:1.26.0-9.el80:1.26.0-9.el8
Red Hat:openshift:4.13::el8cri-tools-debugsourcebefore 0:1.26.0-9.el80:1.26.0-9.el8
Red Hat:openshift:4.13::el8openshiftbefore 0:4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el80:4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el8
Red Hat:openshift:4.13::el8openshift-clientsbefore 0:4.13.0-202608122150.p2.gd192e90.assembly.stream.el80:4.13.0-202608122150.p2.gd192e90.assembly.stream.el8
Red Hat:openshift:4.13::el8openshift-clients-redistributablebefore 0:4.13.0-202608122150.p2.gd192e90.assembly.stream.el80:4.13.0-202608122150.p2.gd192e90.assembly.stream.el8
Red Hat:openshift:4.13::el8openshift-hyperkubebefore 0:4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el80:4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el8
Red Hat:openshift:4.13::el8skopeobefore 2:1.11.3-7.rhaos4.13.el82:1.11.3-7.rhaos4.13.el8
Red Hat:openshift:4.13::el8skopeo-testsbefore 2:1.11.3-7.rhaos4.13.el82:1.11.3-7.rhaos4.13.el8
Red Hat:openshift:4.13::el9cri-obefore 0:1.26.5-32.rhaos4.13.git1088e36.el90:1.26.5-32.rhaos4.13.git1088e36.el9
Red Hat:openshift:4.13::el9cri-o-debuginfobefore 0:1.26.5-32.rhaos4.13.git1088e36.el90:1.26.5-32.rhaos4.13.git1088e36.el9
Red Hat:openshift:4.13::el9cri-o-debugsourcebefore 0:1.26.5-32.rhaos4.13.git1088e36.el90:1.26.5-32.rhaos4.13.git1088e36.el9
Red Hat:openshift:4.13::el9cri-toolsbefore 0:1.26.0-9.el90:1.26.0-9.el9
Red Hat:openshift:4.13::el9cri-tools-debuginfobefore 0:1.26.0-9.el90:1.26.0-9.el9
Red Hat:openshift:4.13::el9cri-tools-debugsourcebefore 0:1.26.0-9.el90:1.26.0-9.el9

+96

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-45496Openshift-controller-manager: elevated build pods can lead to node compromise in openshift
    39Monitor
  • CVE-2024-7387Openshift/builder: path traversal allows command injection in privileged buildcontainer using docker build strategy
    37Monitor
  • CVE-2026-49332Openshift/oauth-proxy: openshift/oauth-proxy: underscore header smuggling enables identity impersonation on wsgi/php upstreams
    34Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-6508Aug 21, 2024 · Openshift-console: oauth2 insufficient state parameter entropy
    32Monitor
  • ← EarlierCVE-2024-45497Dec 30, 2024 · Openshift-api: openshift-controller-manager/build: build process in openshift allows overwriting of node pull credentials
    30Monitor
  • Later →CVE-2026-50237Aug 11, 2026 · Openshift/console: namespace tenant ssrf with egress bypass, catalog poisoning, and admin-mediated supply chain escalation via projecthelmchartrepository in ope
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:cri-o0:1.35.6-5.rhaos4.22.git41f610b.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:cri-o-debuginfo0:1.35.6-5.rhaos4.22.git41f610b.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:cri-o-debugsource0:1.35.6-5.rhaos4.22.git41f610b.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:openshift0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el8 · Red Hat:openshift:4.22::el8Package registry (OSV)
red hat:openshift-clients0:4.22.0-202608131626.p2.g7ec2e14.assembly.stream.el8 · Red Hat:openshift:4.22::el8Package registry (OSV)
red hat:openshift-clients-redistributable0:4.22.0-202608131626.p2.g7ec2e14.assembly.stream.el8 · Red Hat:openshift:4.22::el8Package registry (OSV)
red hat:openshift-hyperkube0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el8 · Red Hat:openshift:4.22::el8Package registry (OSV)
red hat:openshift-kube-apiserver0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:openshift-kube-controller-manager0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:openshift-kube-scheduler0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:openshift-kubelet0:4.22.0-202608190726.p2.g05744ab.assembly.stream.el9 · Red Hat:openshift:4.22::el9Package registry (OSV)
red hat:ose-aws-ecr-image-credential-provider0:4.22.0-202608131626.p2.gb4bad3f.assembly.stream.el8 · Red Hat:openshift:4.22::el8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-134 · Use of Externally-Controlled Format String

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (14 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records